278 BULLETm ir., UNITED STATES NATIONAL MUSEUM. 



AbdoiiHMi ill the 9 j^reutly 1«Mijitheiu'tl, usually t^sUv or more tlmn 

 twice thi' lougtli of tlu' Ih'jkI aii<l tlioiax to^iotlicr, sinuat«Ml or slijjlitly 

 eoiitnicted beyond the middle, the apii-al nortioii Ikmii^' iiarro\ve<l and 

 pointed; the Ke<-ond se<;inent, as usual, is the lonji'esf. hut the follow- 

 ing are .also lengthened; in the 3 oblong-oval as long as tlie head and 

 thorax together, the second segment very long, the following all short, 

 the terminal segnu'ut curving downward and with a distinct margin. 



Legs clavate, the ]>asal Joint of hind tarsi not (|uite twi«'e the length 

 oi" the second. 



The very long, i>ointe<l abdomen distinguishes tlu* genus. 



TAULE OF SPECIES. 



FKMAI.K8. 



Hea«l fiiK'ly punctate, tlie thorax smootli, iinpnnctured 3 



Head and tliorax finely mioroscopic ally punctate or shagreened. 



All coxa' black ". 2 



Ilind coxii^ alone black ; legs lufonss. 



Second fnniclar joint as long as the pedicel P. canadensis Aslini. 



Second fani<lar joint shorter than the j>edicel P. a^ikricants Aslnn. 



2. Femora black or brown black, tibia- and tarsi rnfons. 



Fifth abdominal segment mnch longer than the last P. nigrifemir Aslim. 



Fifth abdominal segment shorter than the last P. vancouverexsis. sp. n. 



Legs i>iceons, anterior tibia', base of middle and posterior tibite and all tarsi houey- 

 yellow; antennie black. 

 First funiclar joint contracted, not longer than thick, collar not striate at 



sides P. LiriNicoLA, sp. nov. 



First fnniclar joint longer than thick ; collar striate at sides. P. picipes, sp. nov. 

 Legs brownish-yellow; second funiclar joint about half the length of the 



pedicel P. PALUPES Ashm. 



Legs honey-yellow ; scape and the pedicel at tip, yellow. P. melliscapus, sp. nov. 



3. Abdomen 21 times as lonir as the li ad and thorax together; very strongly de- 



pressed, when viewed fn ni the side cultriform. Coxa' piceous; legs 



bright yeliow P. compressiventris, sp. nov. 



Abdomen H times as long as the head and thorax together, not depressed. 



Coxjt and legs, yellow P. auripes, sp. nov. 



Coxie black ; tip of anterior femora and tibia', base of middle andiiosterior tibia; 



and all tarsi, honey-yellow P. alnicola, sp. nov. 



Polymecus canadensis Ashm. 



Ectadiua cnnadensh Ashm., Can. Ent., xx, p. .51. 



9. Length, 3""". Polished black; the head poste .iorly very finely 

 shagreened and delicately transversely striated; lateral ocelli about 

 twice their width from the eye ; face jwlished, impunctured. The front 

 ocellus with a transverse furrow at base before ; mandibles black. Anten- 

 nae 10-jointed, brown black, the scape tinged with rufous ; pedicel as long 

 as the second funiclar joint but not so thick; first funiclar joint small; 

 club 6-jointed, the first two joints a little more slender than the following, 

 the first, a little longer than the second; joints 3, 4, and 5 about equal 

 in length, 1^ times longer than thick, the upper, outer angle of each 



